The greenhouse effect has been keeping the Earth warm enough for human life since its beginnings. Infrared radiation comes from the sun into our atmosphere. The greenhouse gases of water vapor, carbon dioxide (CO2), methane and ozone (and a few others) prevent some of this heat reflecting back into space, thus keeping the planet warm.
However, since the 18th century, when we began to build factories, invent vehicles and produce electricity, humankind has been slowly putting more and more CO2 into the atmosphere. Every time we burn coal, gas or oil we increase the amount of greenhouse gases.
Forests too, which absorb carbon dioxide, have been cut down, and are still being cut down, all over the planet. With fewer trees, more of the CO2 goes into the atmosphere.
In 1800 the world population was less than one billion. Today it is close to 7 billion. Seven billion people wanting food, water and electricity and a share in the good life make a colossal demand on the resources of our planet.
So the increased greenhouse gases keep in more of the sun's heat. Global warming!
Yes, the results could differ because the atmospheric pressure varies with altitude, which can affect the boiling point of liquids, including the melting point of solids. The lower atmospheric pressure at the top of a mountain can cause the melting point of a substance to be slightly lower than at sea level.
Texture refers to the size, shape, and arrangement of a rock's mineral grains or crystals, which can range from fine-grained to coarse-grained. Composition, on the other hand, refers to the types of minerals present in the rock and their proportions. Understanding both texture and composition is essential for identifying and classifying rocks accurately.
The composition of an element is fixed because each element is made up of a unique type of atom with a specific number of protons in its nucleus. This number of protons determines the element's identity, and any change in the number of protons would result in a different element. Therefore, the composition of an element cannot be altered without changing its identity.
Convection is the transfer of heat by the movement of a fluid, such as air or water. In the context of land, convection helps explain how heat from the ground is transferred to the atmosphere, leading to differences in temperature between the land surface and the air above it. This temperature difference is responsible for the movement of air masses and the formation of weather systems over land.
A mixture is a physical combination of two or more substances that are not chemically bonded, allowing their composition to vary. This is because mixtures retain the properties of their individual components and can be easily separated through physical means, while compounds are chemically bonded in fixed ratios, resulting in consistent composition and properties.
explain the use of line of composition?
this never has the answers i need!
the atmospheric subduction process
nothing
Chemistry explain the chemical composition and structure of materials, the interaction of substances and produce new materials.
no,as its composition changes and it can not be brought to its original state
False
Photosynthesis helps keep oxygen levels constant by converting carbon dioxide into oxygen, while cellular respiration helps keep carbon dioxide levels constant by converting oxygen into carbon dioxide. These processes are vital for maintaining the balance of atmospheric gases essential for life on Earth.
The adiabatic gradient is important in atmospheric science because it helps us understand how temperature changes with altitude in the atmosphere. This gradient helps explain the behavior of air parcels as they rise or sink, which is crucial for predicting weather patterns and understanding atmospheric dynamics.
Melting: change of phase, a physical phenomenon without change of the composition. Burning: a reaction of oxydation, a change of composition - a chemical change.
Atmospheric (external) air contains a high percentage of oxygen and nitrogen whereas alveoli gas contains a lower percentage of oxygen and a higher percentage of carbon dioxide. The differences in composition are due to the fact that gaseous exchange is taking place within the alveoli in the lungs. Oxygen is diffusing from the alveoli into the pulmonary artery and carbon dioxide is diffusing back into the alveoli from the pulmonary artery due to the concentration gradients. This is the main reason why external air and alveolar gas have such different compositions. Another reason why the gas compositions are different is due to the fact that alveoli gas contains a mixture of both atmospheric air which has been inhaled and 'old' air which stays in the respiratory track and is not exhaled after each breath therefore giving it a different composition. Alveolar gas has a larger percentage of water vapour than atmospheric air due to the fact that air is being warmed and moistened as it travels into the respiratory track. This is done by the mucus in the nasal cavity as the air travels past it.
Many diseases are airborne. The winds may spread them.